She is your best friend, and it's hard to believe you weren't born into the same family.

Perhaps if you were, you wouldn't be so close, but there's literally no one who you love more — to the moon and back.

She knows all the details of your life, and even if you wanted privacy, she sees right through you anyway. Sometimes, it's not comfortable, but there's a reassurance in knowing she's got your back at all times.

Your boyfriend might get jealous that she has such a huge place in your heart. When he's around — or especially when he isn't — she is your sidekick and your squad crew member in one package.

She's more than a friend, she's your sister and soulmate. And the best part is? She feels the same thing about you, too.

It doesn't matter. Your friendship is strong, tested, tried and true. There's literally nothing that you can't face that the world throws your way as long as you have each other to depend on.

If your friendship is closer than two peas in a pod, and your love can only be measured to the moon and back, then here are 7 amazingly adorable matching best friend tattoos to say, "I love you... to the moon and back." It's the ultimate friendship tattoo idea.

If you talked about getting a tattoo at the same time, it only makes sense to commemorate the moment to make it double meaningful.

Nothing says, "We are more than best friends" in word and symbol like a matching tattoo!

For besties who complete each other's sentences.

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Put it in words.

For best friends who are going places together.

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Small and sweet.

For best friends who love that their friendship is different from anyone else's.

Photo: weheartit

The distance to the moon in miles.

For best friend squads.

Photo: weheartit

#squadgoals

When you love to tell each other stories.

Photo: weheartit

And finish each other's sentences.

For best friends of the opposite sex.

Photo: weheartit

Day and night.

When you respect each other's differences and it makes things even sweeter.